v3.25.1
Investments - AFS - Gross Unrealized Losses (Details)
$ in Millions
Mar. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Fair Value    
12 Months or Greater $ 1,928 $ 2,096
Less Than 12 Months 1,278 1,267
Total 3,206 3,363
Gross Unrealized Losses    
12 Months or Greater (299) (342)
Less Than 12 Months (45) (59)
Total $ (344) $ (401)
Number of securities classified as available-for-sale in an unrealized loss position | security 3,329 3,688
Number of securities classified as available-for-sale in an unrealized loss position for twelve months or longer | security 2,092 2,267
U.S. government and agency    
Fair Value    
12 Months or Greater $ 69 $ 77
Less Than 12 Months 187 116
Total 256 193
Gross Unrealized Losses    
12 Months or Greater (14) (16)
Less Than 12 Months (2) (4)
Total (16) (20)
U.K. government    
Fair Value    
12 Months or Greater 8 8
Less Than 12 Months 21 15
Total 29 23
Gross Unrealized Losses    
12 Months or Greater (2) (2)
Less Than 12 Months (1) (1)
Total (3) (3)
Other government    
Fair Value    
12 Months or Greater 47 45
Less Than 12 Months 176 203
Total 223 248
Gross Unrealized Losses    
12 Months or Greater (7) (8)
Less Than 12 Months (14) (16)
Total (21) (24)
Corporate    
Fair Value    
12 Months or Greater 1,221 1,327
Less Than 12 Months 463 620
Total 1,684 1,947
Gross Unrealized Losses    
12 Months or Greater (209) (235)
Less Than 12 Months (22) (31)
Total (231) (266)
Municipal    
Fair Value    
12 Months or Greater 66 69
Less Than 12 Months 5 6
Total 71 75
Gross Unrealized Losses    
12 Months or Greater (12) (14)
Less Than 12 Months (1) (1)
Total (13) (15)
Residential mortgage-backed    
Fair Value    
12 Months or Greater 190 198
Less Than 12 Months 66 66
Total 256 264
Gross Unrealized Losses    
12 Months or Greater (31) (37)
Less Than 12 Months (1) (1)
Total (32) (38)
Commercial mortgage-backed    
Fair Value    
12 Months or Greater 317 351
Less Than 12 Months 137 117
Total 454 468
Gross Unrealized Losses    
12 Months or Greater (24) (29)
Less Than 12 Months (2) (4)
Total (26) (33)
Asset-backed    
Fair Value    
12 Months or Greater 10 21
Less Than 12 Months 223 124
Total 233 145
Gross Unrealized Losses    
12 Months or Greater 0 (1)
Less Than 12 Months (2) (1)
Total $ (2) $ (2)